Patents by Inventor Hiroto Sunaba

Hiroto Sunaba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus for preventing urging rotation of a ball screw shaft for a linear working machine
    Patent number: 5669264
    Abstract: An apparatus for preventing urging rotation of a ball screw shaft in a linear working machine includes a housing. A compressive force stopper and a tensile force stopper is contained in an outer casing of the housing. The compressive force stopper and the tensile force stopper are pressed against the compressive force receptive rotation member and the tensile force receptive rotation member respectively. A coil spring is strictly wound around an outer periphery of the compressive force receptive rotation member and the tensile force receptive rotation member. Urging rotation of the ball screw shaft by external force in an axial direction is prevented by the compressive force receptive rotation member, the tensile force receptive rotation member and the coil spring.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: September 23, 1997
    Assignee: Tsubakimoto Chain, Co.
    Inventors: Shunji Sakura, Koichi Saeda, Hiroto Sunaba, Naoto Shibata